| Acronym | Meaning |
| ELM | Emulsion Liquid Membranes |
| MPO | Metropolitan Planning Organization |
| PSIM | Phase Shifting Interferential Microscopy |
| UCC(N) | Unitary Coupled-cluster [truncated To Nth Order] |
| CLOT | Carbon Layer Open Tubular (column) |
| ARM | Anhysteretic Remanent Magnetization |
| CCMET | Coupled-cluster Many-electron Theory |
| PORG | Photochemical Oxidants Review Group |
| STEAM | Stratosphere-Troposphere Exchange And Climate Monitor |
| CAS-MC-SCF | Complete Active Space-multiconfiguration-SCF |